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# HW7 - 3 Construct a magnitude comparator using any number...

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PHYS3360/AEP3630 Electronic Circuits, Spring 2011, HW7 1 MOSFET’s and Digital Circuits HW7 : Friday, Mar 18, 2011 DUE : Friday, Apr 1, 2011 READ : Lab Manual, Chapter 8 (read ahead) QUIZ7 : Due Fri, Apr 1 (there is no Q6) Problems 1. Differential amplifier using MOSFET’s. Lab Manual Chapter 7, Practice Problem 2. 2. Design the digital logic for a rotator. The circuit has four inputs A 0 -A 3 , a single control line C, and four outputs X 0 -X 3 . When C = 1, the input bits are rotated to the right one place, so that X 3 = A 2 , X 2 = A 1 , X 1 = A 0 , and X 0 = A 3 ; when C = 0, the input bits are rotated to the left one place. a. Derive Boolean expressions for the outputs X i . b. Sketch an implementation using NAND gates only.
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Unformatted text preview: 3. Construct a magnitude comparator using any number of basic gates (AND, OR, NOT), that tells whether or not A < B, A = B, or A > B, where A and B are 2-bit numbers: A = (A 1 A ) 2 , B = (B 1 B ) 2 . The circuit has 4 inputs: A 1 , A , and B 1 , B representing the two 2-bit binary numbers with A 1 and B 1 serving as most significant bits and A and B as least significant bits. The circuit should have 3 outputs: (1) A < B, (2) A = B, and (3) A > B. Obviously, one and only one output can be TRUE at any given time. Show the steps you used to arrive at the circuit....
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